The management of a supermarket wants to find if there is a relationship between the number of times a specific product is promoted on the intercom system in the store and the number of units of that product sold. To experiment the management selected a product and promoted it on the intercom system for seven days. The following table gives the number of times this product was promoted each day and the number of units sold.
Number of Promotions per Day Number of Units Sold per Day (hundreds)
15 11
22 22
42 30
30 26
18 17
12 15
38 23
a) With the number of promotions as an independent variable and the number of units sold as the dependent variable determine the least squares regression line. Give the equation of the line.
b) Compute r and r2. Explain their meaning.
c) Predict the number of units of this product sold on a day with 35 promotions.
d) Construct a 98% confidence interval for \beta .
e) Test at the 1% significant level that \beta is \beta \neq 0.

Answers

Answer 1

Answer:

15 11

Step-by-step explanation:


Related Questions

PLEASE HELP ME!!!! MATH!!!!

Answers

Answer:

Whats misleading is that it gives decimals for the part that says "thousands of dollars" it it is very vivid

Why i think the company would present this graph is To see their budget and income per month and etc.

_____________________________________________________________-

Because on the 2015 box graph is is 3d shaped also, it doesnt have the name for 0 ~ 400 books and etc

2013: 1000

2014: 2000

1015: 4000

___________________________________________________________________

The impression this graph gives is organized for profits but hard to understand

8.3 is equal to
tenths
hundredths​

Answers

Answer:  

83 Tenths  

830 hundreths  

Step-by-step explanation:  

8.30=8.3 Remove the points and they will give you how many tenths or hundreths

(hope this helps can i plz have brainlist :D hehe)

Answer:

8.3 tenths place is 3

8.3 hundredths place is 0

Why?

Because the first digit right of the decimal point will always be considered the tenths place, the second digit of the right of the decimal point is going to be the hundredths place, in this case it is 0 since there is no value of the hundredths place so you simply consider it 0. The tenths place is given since it is the first digit right of the decimal point, which is 3.

Suppose that a password consists of 2 letters followed by 4 digits, where there are 26 letters and 10 digits to choose from. How many different passwords are possible?

Answers

Answer:

68250

Step-by-step explanation:

Number of ways in which 2 letters can be selected out of 26 letters = 26 c 2 = 26 ! / ( 2! x 24! ) = 325

Number of ways in which 4 digits can be selected out of 10 digits = 10 c 4 = 10 ! / ( 4! x 6! ) = 210

So , total number of ways in which password containing 2 letters & 4 digits can be made = 325 x 210 = 68250

Chandra needs to make 3 gallons of punch. How many cups of frozen strawberries are needed? Use the drown-down menus to complete the answer.

Answers

The number of cups of frozen strawberries that are needed to make 3 gallons of punch is equal to 48 cups.

How to calculate the cups of frozen strawberries needed?

In this exercise, you're required to determine the number of cups of frozen strawberries that are needed to make 3 gallons of punch. Thus, we would apply direct proportion.

Note: There are 16 cups of frozen strawberries in a gallon.

By direct proportion:

16 cups = 1 gallon

X cups = 3 gallons

Cross-multiplying, we have:

X = 16 × 3

X = 48 cups of frozen strawberries.

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3sin²x-2cos²x=5sin²x-2​

Answers

Answer:

L.H.S.3sin²x-2cos²x3sin²x-2(1-sin²x)3sin²x-2+2sin²x5sin²x-2R.H.S proved

Step-by-step explanation:

Note:

we have

sin²x+cos²x=1

replacing it

cos²x=1-sin²x

[as we need sin on right hand side.]

A card is drawn randomly from a standard 52-card deck. Find the probability of the given event.
(a) The card drawn is 5
(b) The card drawn is a face card (Jack, Queen, or King)
(c) The card drawn is not a face card.

Answers

Answer:

a). 1/13

There are 4 5s. so 4/52

b). 3/13

12 total jack, king, and queen. 12/52

c). 15/26

30 cards are not face cards so 30/52

What are fees paid to the lender before it releases a check for the home
purchase called?
A. Nonrecurring fees
B. Home fees
C. Recurring fees
D. Closing costs
SUBMIT

Answers

c. closing costs is the correct answer.
The answer is D. Closing costs

Plz help me

Use the discriminant to determine The number of solutions to the quadratic equation -x^2+10x-2=0

Answers

Answer:

x=-5

Step-by-step explanation:

i just solved the problem

Answer:

=5±√23

Step-by-step explanation:

        -10+2√23

= -------------

               -2

         -10-2 √23

= -------------

                -2

HELP
When x=7
7+7(x-3)²

Answers

Answer:

it should be 119

Step-by-step explanation:

(7-3) = 4

4^2 = 16

16 x 7 = 112

112 + 7 = 119

Answer: 119

[tex]7+7(x-3)^{2}[/tex]

[tex]7+7(7-3)^{2}[/tex]

[tex]7+7(4)^{2}[/tex]

[tex]7+7(16)[/tex]

[tex]7+112[/tex]

=119

You transform the point (-8, 4) by rotating it 180 degrees
around the origin. What are the coordinates of the new
point?

Answers

Answer:

(8 , -4)

Step-by-step explanation:

____________________

The new coordinate after rotating it 180 degrees around the origin will be;

⇒ (8, - 4)

What is Translation?

A transformation that occurs when a figure is moved from one location to another location without changing its size or shape is called translation.

Given that;

The point is,

(- 8, 4)

And, It rotating it 180 degrees around the origin.

Now,

The rule of the transformation to rotating it 180 degrees around the origin is;

(x, y) ⇒ (- x, - y)

Thus, The new point after rotating it 180 degrees around the origin is,

(- 8, 4) = (8, - 4)

Therefore, The new coordinate after rotating it 180 degrees around the origin will be;

⇒ (8, - 4)

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Given AJKL: AXYZ, find x.

Answers

Answer:

6 = 9

8 x

we cross multiply 6× x = 6x 9×8 = 72

6x = 72

6 6

x = 12

Jess stopped at an ATM location to deposit 2 one hundred-dollar bills and checks for $474.85 and $321.15. He received $50.00 in cash. Find the total deposit. *

Answers

Step 1: Add the deposit and checks together
$200
+ $474.85
+ $ 321.15
= $996.00

Step 2: Subtract cash back from the total result found
996.00
- 50.00
= $946.00

The total deposit is $946.00.

A school's art club holds a bake sale on Fridays to raise money for art supplies. Here are the
number of cookies they sold each week in the fall and in the spring:
fall
20
26
25
24
29
20
19
19
24
24
spring
19
22
29
21
125
22
26
21
25
25
a Find the mean number of cookies sold in the fall and in the spring
Fall
Spring

Answers

Answer:

Fall - 23 Spring - 24

Step-by-step explanation

The box plots show the average gas mileage, in miles per gallon, of the cars sold at a dealership in June and in
December
Gas Mileage of Cars Sold in June

which inference can be made about cars?

a) The type of cars sold in June typically gets better gas mileage

b) The type of cars sold in December typically gets better gas mileage

c) The type of cars sold in the two months typically get about the same gas mileage

d) The types of cars sold in the two months typically get better gas mileage then those sold in other months

please help, thanks!

Answers

Answer:C

Step-by-step explanation:

I took the test

Answer:

C

Step-by-step explanation:

The types of cars sold in the two months typically get about the same gas mileage.

Given the following formula, solve for l.

Answers

P=2(l + b)
P=2l + 2b
P-2b=2l
P-2b/2=l
C is your answer

Answer: Option C

l = (P - 2b)/2

Step-by-step explanation:

From P = 2(l + b)

Divide both sides by 2;

P/2 = 2(l + b)/2

P/2 = l + b

l + b = P/2

Make l the subject of formula;

l = (P/2) - b

l = (P - 2b)/2

Please help me with this question

Answers

Answer:

It is 65 cm

Step-by-step explanation:

Alright, within the image, the triangles ABC and TUV are congruent. With this, the following is true: AB ≅ TU, BC ≅ UV, and CA ≅ VT because the order and their sides between the two triangles is shared.

With this, BC is ≅ to UV. Now, just set the two equations equal to each other:

9x+2=8x+9

9x=8x+7

x=7

Now, we've got x, though it needs to be plugged back into side BC for the final answer

9(7)+2

63+2

65 cm

What is 3(4x−8) in simplified form?

7x−11

12x−8

12x + 24

12x−24

Answers

12x-24
Explain: 3(4x-8) —> 3*4x= 12x. 3*-8= -24
Therefore: 12x-24

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\boxed{\mathsf{3(4x - 8)}}\\\huge\text{DISTRIBUTE 3 WITHIN the PARENTHESES}\\\huge\boxed{\mathsf{= 3(4x) + 3(-8)}}\\\huge\boxed{\mathsf{= 12x - 24}}\\\\\huge\boxed{\textsf{Answer: Option D. \bf 12x - 24}}\huge\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

1/2, 3/4, 1, …What are the 6th and 7th terms of the sequence?

Answers

Answer:

Answer

It can be (1+x)

n

only as (1−x)

n

terms are +ve/−ve alternatively hence can't be in A.P.,

General term, T

rH

=

n

C

r

⋅x

r

⇒T

5

=

n

C

4

⋅x

4

,T

6

=

n

C

5

⋅x

5

,T

7

=

n

C

6

⋅x

6

Coefficients are in A.P.

⇒2

n

C

5

=

n

C

4

+

n

C

6

5!(n−5)!

2n!

=

4!(n−4)!

n!

+

6!(n−6)!

n!

5(n−5)

2

=

(n−4)(n−5)

1

+

6×5

1

⇒2(n−4)=5+

6

1

(n−4)(n−5)

⇒12(n−4)=30+n

2

−9n+20

12n−48=n

2

−9n+50

⇒n

n

−21n+98=0

⇒n

2

−14n−7n+98=0

⇒n(n−14)−7(n−14)=0

⇒(n−7)(n−14)=0

n=7 or n=14.

pick number 1-10 if you get it right ill pay 50 dollas

Answers

Answer: im going to guess 4 <3

find the value of x. round to the nearest tenth.

Answers

Answer:

x = 17.6

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

cos theta = adj / hyp

cos 51 = x /28

28 cos 51= x

x=17.62097

To the nearest tenth

x = 17.6

In a glass the ratio of water
to juice is 11:2
What fraction of the drink
is juice?

Answers

Answer:

The fraction of the drink that is juice is [tex]\frac{2}{13}[/tex]

Step-by-step explanation:

Since the ratio of the water to juice is 11:2, that means the ratio of juice to the total amount of liquid in the glass would be [tex]\frac{2}{11+2}[/tex] or [tex]\frac{2}{13}[/tex].

The fraction of the drink that is juice is [tex]\( \frac{2}{13} \)[/tex].

The ratio of water to juice in the glass is 11:2. This means that for every 11 parts of water, there are 2 parts of juice in the drink.

To find the fraction of the drink that is juice, we need to add the number of parts of juice and water together. In this case, we have 11 parts of water and 2 parts of juice, making a total of [tex]\(11 + 2 = 13\)[/tex] parts.

Now, to find the fraction of juice in the drink, we divide the number of parts of juice by the total number of parts in the drink. So, we have:

[tex]\( \text{Fraction of juice} = \frac{\text{Number of parts of juice}}{\text{Total number of parts}} = \frac{2}{13} \).[/tex]

Thus, [tex]\( \frac{2}{13} \)[/tex] of the drink is juice.

In summary, to find the fraction of juice in the drink, we first add the number of parts of juice and water together to get the total parts in the drink.

Then, we divide the number of parts of juice by the total parts to find the fraction of juice. In this case, the fraction of juice in the drink is [tex]\( \frac{2}{13} \).[/tex]

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An orange juice manufacturer advertises a new orange juice product that contains 50% less sugar. This new product is expected to increase profits substantially because they create the 50% less sugar product by replacing 50% of the juice with water while selling it for the same price. An inspector wants to investigate whether the actual percentage of water in the product is within 5% of the intended 50%.
He selects a random sample of 500 containers of orange juice and determined the percentage of each that is water. He plans to conduct a significance test at the a = 0.01 level to see if there is convincing evidence that the proportion of water added is different from 0.50. What is the probability that the inspector makes a Type I error?
(A) 0.01
(B) 0.05
(C) 0.10
(D) 0.45
(E) 0.50

Answers

Answer: A. 0.01

Step-by-step explanation:

Type I error are refered to as false positives and it means that when a statistically significant difference is validated by the researcher even though the results aren't statistically significant.

Type I error is when one rejects the null hypothesis even though it's actually true. In this case, the inspector rejects the hypothesis which was that the proportion of water that is contained the product is 0.5.

The probability of type 1 error will then be equal to the hypothesis level of significance and this will be 0.01.

$24,000 at 5.5% for 5 years

Answers

You will get 250,000

please help me

Find YZ

Answers

Answer:

blah

Step-by-step explanation:

blah

The owner of a home cleaning company provides her customers with?
A) Promotion
B) Services
C) Brand Name
D) Places

Answers

Answer:

Step-by-step explanation:

services

I NEED HELP ON THIS PROBLEM QUICKLY PLEASE AND THANK YOU

Answers

Try looking it up on the app called socratic and you just might find it

each saturday, tina mows lawns to earn extra money which she puts into a savings account. the graph shows the balance of tina’s savings accounts over the first six weeks of mowing lawns. according to this pattern, how much will tina have in her account after 15 weeks of mowing lawns?

Answers

Answer:

$255

Step-by-step explanation:

First, we need to generate an equation in slope-intercept form, y = mx + b, that represents the graph. To do this, we need to find b = initial value (y-intercept) and m = slope (money she puts in her account each week).

x = number of weeks

y = balance ($)

✔️Slope (m) = change in y/change in x

Using two points on the line, (1, 45) and (2, 60),

Slope (m) = (60 - 45)/(2 - 1) = 15/1

m = 15

✔️To find b, substitute (x, y) = (1, 45) and m = 15 into y = mx + b.

45 = 15(1) + b

45 = 15 + b

45 - 15 = b

30 = b

b = 30.

✔️To write the equation, substitute m = 15 and b = 30 into y = mx + b

y = 15x + 30

✔️To determine how much Tina will have in her account (y) after 15 weeks (x) of mowing, substitute x = 15 into y = 15x + 30:

y = 15(15) + 30

y = 225 + 30

y = 2

Therefore, Tina will have $255 in her accounts after 15 weeks of mowing lawns.

Based on the figure below, what is the value of x? (5x + 15) 30° 3 09 O 12 15​

Answers

Answer:

is this from FLVS?

Step-by-step explanation:

An office upgrades its internet speed from 10^4 bits per second to 10^8 bits per second. How many times greater is the new internet speed?

Answers

10000 times greater
10^4 is 10000
And 10^8 is 100000000

A non-profit organization plans to hold a raffle to raise funds for its operations. A total of 1,000 raffle tickets will be sold for $1.00 each. After all the tickets are sold, one ticket will be selected at random and its owner will receive $50.00. The expected value for the net gain for each ticket is -$0.95. What is the meaning of the expected value in this context?
A. The ticket owners lose an average of $0.05 per raffle ticket.
B. The ticket owners lose an average of $0.95 per raffle ticket.
C. Each ticket owner will lose $0.95 per raffle ticket.
D. A ticket owner would have to purchase 19 more tickets for the expected value of his or her net gain to increase to $0.00.
E. A ticket owner has a 95 percent chance of having a ticket that is not selected.

Answers

Answer:

The answer is "Option b".

Step-by-step explanation:

In the given question, 1000 ticket were sold for [tex]\$1[/tex] and the owner who receives tickets which are  randomly chosen that wins [tex]\$50[/tex].

[tex]Net\ profit = 1000\times 1-1\timesv 50 = \$950\\\\Net \ profit \ for\ ticket = \frac{\$950}{1000} = \$0.95[/tex]

The probability in which each ticket owners win [tex]= 0.001[/tex]

therefore the ticket owner net profit = [tex]= -1+0.001\times 50 = -0.95\\\\[/tex]

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